Finding the Fourth Proportional to 1,168.05, 1,611.78 and 670.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.05 : 1,611.78 = 670.71 : x
2. Step 2: Convert to fraction form
   1,168.05/1,611.78 = 670.71/x
3. Step 3: Cross multiply
   1,168.05x = 1,611.78 × 670.71
4. Step 4: Simplify right side
   1,168.05x = 1,081,036.96
5. Step 5: Solve for x
   x = 1,081,036.96/1,168.05
6. Step 6: Final answer
   x = 925.51